Study on Gravitational Waves from Binary Mergers and Constraints on the Hubble Parameter

TL;DR

This paper explores how gravitational wave observations from binary mergers, especially electromagnetic counterparts, can help resolve the Hubble Tension by providing independent measurements of the Hubble Constant.

Contribution

It investigates the properties of gravitational waves from binary mergers with electromagnetic signals and proposes a framework to address the Hubble Tension using upcoming GW observatories.

Findings

Analysis of GW data from binary mergers with electromagnetic counterparts.

Potential for future GW observatories to improve Hubble Constant measurements.

Framework for integrating GW observations to reduce Hubble Tension.

Abstract

Einstein's General Theory of Relativity predicted the existence of gravitational waves (GWs), which offer a way to explore cosmic events like binary mergers and could help resolve the Hubble Tension. The Hubble Tension refers to the discrepancy in the measurements of the Hubble Constant, Ho, obtained through different methods and missions over various periods. By analyzing gravitational wave data, particularly from mergers that also emit light (electromagnetic radiation), such as Bright Sirens, we aim to reduce this tension. This paper will investigate the properties of GWs produced by these binary mergers and utilize a mathematical framework to tackle the Hubble Tension. Future advancements in gravitational wave astronomy, particularly with initiatives like LIGO-India and LISA, promise to enhance research outcomes. The ground-based LIGO-India will increase sensitivity and improve localization, while the space-based LISA will target lower frequency ranges of GWs, enabling the detection of signals from a wider array of sources.